This document discusses different measurement systems and measuring tools used in automotive work. It covers the metric and United States customary measurement systems, including common unit conversions between the two. A variety of measuring tools are then described, such as micrometers, dial indicators, calipers, and depth gauges used to accurately measure lengths, distances, and sizes. The document concludes by explaining common automotive fasteners like bolts, nuts, rivets and rings that hold vehicle parts together, as well as gaskets and seals that prevent fluid leakage between components.

1. CHAPTER 5
MEASURING
SYSTEM AND
MEASURING
TOOLS

2. MEASURING
SYSTEM
METRIC
SYSTEMUNITED STATES
CUSTOMARY
SYSTEM

3. METRIC
SYSTEMA decimal system of
weights and
measures based on
the meter and on the
kilogram
Meter Length
Grams Mass or Weight
Liter Volume

4. UNITED STATES
CUSTOMARY
SYSTEM
Yard or Inch Length
Pounds Weight
Feet Height
The main system of
weights
and measures used in the
United States and a few ot
her countries.

5. Metric System
United sates
Customary
System

6. USC to USC 1 Foot = 12 inches
in-ft. /12
Metric to Metric 1 meter = 10 decimeter
cm-mm *10
USC to Metric 1 inch = 2.54
1 foot = 30.48
Metric to USC 1 Meter = 3.28 Feet
1 meter = 39.37 inches.

7. MEASURIN
G TOOLS

8. Measuring
ToolsA measuring tool is anything used
to take a count of quantitative
data, such as weight, length, time
or temperature.

9. Wire Gauge
Use for
measuring the
diameter of wire.

10. Thickness
Gauge
Use to Measure
small gaps or
distances between
two parts
Feeler Gauge

11. Micrometer
It measures
thicknesses in
thousands or ten-
thousands of an
“Mike”

12. Dial
Indicator
Use to measure
the distance of
shaft and gears.

13. Vernier
Caliperis a device used to measure the
distance between two opposite
sides of an object.

14. Depth
Gauge
It measure the
depth of grooves
or holes.

15. Small-hole
Gauge
Measures the
diameter of
small holes.

16. Dipstick
Use to
measure
engine oil

17. Pressure
Gauge
Measures the
engine cylinder,
fuel pump
pressure and
the tire

18. CHAPTER 6
AUTOMOTIVE
FASTENERS,
GASKETS AND

19. Fasteners
Hold
automotive
parts together.
Soldering and
Welding

20. Fasteners
means to twist
or rotate
something in
order to attach
or tighten it
Screw

22. Fasteners
Nuts are almost
always used in
conjunction with a
mating bolt to
fasten two or more
Nuts and
Bolts

24. Fasteners
Are metal pins
used to fasten
parts together.
Rivets

25. Fasteners
Internal
Snap Rings
External
Keep in
position
Prevent from
sliding

26. Gasket and
SealsGasket
to prevent
leakage from or
into the joined
objects while
under compressio

27. Gasket and
SealsSeal
used to join two
things together so as
to prevent them from
coming apart or to
prevent anything